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                                                                    EXHIBIT 99.1



JDA SOFTWARE ACQUIRES COMSHARE'S ARTHUR RETAIL
Acquisition Adds Market Leader in Strategic Planning Solutions

PHOENIX, ARIZ. - JUNE 4, 1998 - JDA(R) SOFTWARE GROUP, INC. (NASDAQ: JDAS), an
international provider of enterprise retail solutions, announced today its
acquisition of the ARTHUR(R) RETAIL BUSINESS UNIT from COMSHARE(R), INC.
(NASDAQ:CSRE - news), a leading supplier of financial analytic applications for
management planning and control. JDA purchased Arthur Retail, the market leader
in strategic merchandise management software applications, for $44 million in
cash. Arthur Retail, will now operate as JDA Arthur, a division of JDA Software,
Inc. which is a wholly-owned subsidiary of JDA Software Group, Inc.

ACQUISITION KEY STRATEGY FOR JDA GROWTH

According to JDA CEO BRENT W. LIPPMAN, the Company has targeted acquisitions as
a key strategy for building upon its integrated, enterprise retail solution with
complementary products. The Arthur acquisition represents an aggressive move to
further the Company's standing as the leading global provider for the retail
industry.

"Since 1985, we have been very successful at delivering mission-critical
transaction processing systems to retailers around the world," commented
Lippman. "By expanding our analytical offering with the Arthur Enterprise Suite,
we are positioning ourselves to better help our clients proactively manage their
business and find new ways to optimize their revenue sources. And, in today's
increasingly competitive environment, retailers who want to thrive must provide
their knowledge workers with innovative tools, such as the Arthur planning and
decision support products."

JDA TO LEVERAGE EXPANDED CLIENT BASE

In addition to expanding its product line with a new set of functions, JDA
acquired Arthur Retail to gain its more than 240 referenceable customers
including retail giants Wal-Mart, The Limited and Service Merchandise. JDA now
has approximately 540 retail clients in more than 30 countries, reinforcing its
position as the largest retail ERP vendor in the world. This expanded client
base has provided JDA with a wealth of opportunities.

"We have an impressive win ratio in licensing newly developed JDA products, such
as Win/DSS and Retail IDEAS, to our existing clients," commented Lippman. "With
approximately 9% of JDA's merchandising clients currently using Arthur products
and 13% of the Arthur clients using JDA products, the acquisition has
essentially created hundreds of new cross selling opportunities."

Lippman also noted that JDA has increased its competitiveness in winning
business with new prospects, in particular soft lines retailers, that are
dependent upon the detailed planning information that Arthur products can
provide.

GREG MORRISON TO LEAD JDA ARTHUR

Leading JDA Arthur will be five-year JDA veteran, GREGORY MORRISON, who formerly
served as the Company's vice president of Latin American operations. In his new
role as managing director of JDA Arthur, Morrison will continue to report to JDA
CEO Lippman. Reporting to Morrison will be many of the key executives from
Arthur Retail, including PETER CHARNESS, who will serve as vice president of
Arthur Retail product development and marketing
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JDA plans to extend employment offers to Arthur employees worldwide. JDA expects
to gain approximately 115 Arthur associates specialized in retail applications
bringing the Company's staff to more than 1,000 associates operating from 22
worldwide offices.

JDA Arthur will be headquartered in Ann Arbor, Michigan and the division will
maintain a presence in all cities where JDA Arthur staff is currently located.
In cities where there are duplicate JDA and JDA Arthur offices, JDA will
consider merging the offices for greater efficiency and staff development.

EXPANDED SOLUTION PROVIDES INCREASED VALUE FOR CLIENTS

Morrison noted that JDA Arthur would provide new benefits for Arthur retail
clients. "In addition to our exclusive focus on the retail industry, JDA Arthur
clients can continue to expect the highest caliber of products and services to
help them maintain their competitive edge," commented Morrison. "With JDA's
strong development, services and support organizations, we plan to enhance and
expand upon the Arthur Enterprise Suite to keep pace with technology advances
and market demands."

JDA intends to provide a seamless integration among its systems and the Arthur
Enterprise Suite. In addition, the Arthur products will continue to be available
as stand-alone packages, similar to JDA's practice with its existing products.

ABOUT THE ARTHUR ENTERPRISE SUITE

The Arthur Enterprise Suite is the first truly complete set of retail decision
support applications that enables retailers to successfully focus the whole
organization on strategic decision making. The Suite enables the retailer to
review results, plan future seasons, and react swiftly to actual performance as
necessary. The Suite integrates the critical business processes of planning,
assortment planning, allocation, tracking and performance analysis to ensure
that retailers can focus on the resources and factors that result in both
satisfied customers and maximum profits.

The Suite includes six core components: Arthur Planning, the market-leading
merchandise planning application; Arthur Allocation, a tool for product and
store allocation decision making; Arthur Assortment Planning, a tool for
determining store assortments; Arthur Information Manager (AIM), an optimized
database to power the integrated suite; Arthur Performance Analysis, an
enterprise decision support tool which JDA (as a VAR) may distribute to the
retail industry; and Boost Sales and Margin Planning, a merchandise planning
tool for the consumer packaged goods industry.

For the ten months ended April 30, 1998, the Arthur Retail Business Unit had
total revenue of $18 million. The Oracle version of Arthur Planning, as well as
Arthur Allocation, Arthur Assortment Planning and Arthur Information Manager are
still under development and are planned for release over the next twelve months.
Of the $44 million purchase price, approximately $39 million is expected to be
charged to operations by JDA in its second quarter ending June 30, 1998 for an
accounting write-off (before related tax benefits) related to JDA Arthur
in-process research.

COMSHARE TO FOCUS ON FINANCIAL APPLICATIONS

The acquisition has enabled Comshare to refine its strategy to focus on
financial applications for management planning and control.

"With Comshare's sharpened focus on financial applications for management
planning and control, we are pleased that a company like JDA, dedicated to the
retail industry, has purchased the Arthur
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products," said DENNIS GANSTER, COMSHARE'S PRESIDENT AND CEO. "The Arthur
products are an excellent fit with JDA's offerings, and I am confident that our
customers will receive the best service and support possible."

ABOUT COMSHARE


Comshare is a leading provider of financial applications for management planning
and control, including financial consolidation and reporting, enterprise
budgeting, and performance measurement. These complete client/server and
Web-based analytic applications are based on an open architecture, utilizing
market-leading databases, such as Microsoft SQL Server, Oracle, and Arbor
Essbase. Comshare's applications incorporate innovative data visualization and
Guided Analysis(TM) capabilities designed to improve decision-making for
enhanced competitiveness and improved profitability. A strong customer
orientation, application expertise, and commitment to the best technologies have
made Comshare one of the top 100 independent software companies, with customers
around the world, many of which are Fortune 500 and Financial Times Top 1000
companies. Comshare, Inc. is a Microsoft Certified Solution Provider. For more
information, call 1-800-922-7979, e-mail info@comshare.com, or visit Comshare's
Web site at http://www.comshare.com.



ABOUT JDA SOFTWARE GROUP, INC.

JDA Software Group, Inc. (NASDAQ:JDAS) is a global provider of integrated
retail software products and professional services for more than 540 clients
worldwide. Designed to Optimize the Retail Enterprise, JDA's solution addresses
the requirements for the entire retail supply chain: from the corporate level
with merchandising, financial, and data warehouse systems; to the distribution
level with warehouse management and logistics systems; and finally to the store
level with point-of-sale and back-office applications. Founded in 1985, JDA
employs more than 1,000 associates. With headquarters in Phoenix, Arizona, the
company has operations in major cities throughout the United States as well as
international offices in Canada, the United Kingdom, France, Germany, Mexico,
Brazil, Chile, South Africa, Singapore, and Australia. For more information,
refer to JDA's Web site at http://www.jda.com.

CONFERENCE CALL INFORMATION

The Company will host a conference call today at 4:30 p.m. EDT to discuss its
acquisition of the Arthur Retail Business Unit. The following telephone numbers
can be used for anyone interested in participating: U.S. and Canadian callers
can dial 1-800-230-1951. Anyone interested in hearing a replay of the Arthur
Retail Business Unit announcement conference call can dial the following numbers
through June 17, 1998: U.S. and Canadian callers, 1-800-475-6701; international
callers, (320) 365-3844, access code: 392578.

END

This press release contains forward-looking statements that are made in reliance
upon the safe harbor provisions of the Private Securities Litigation Reform Act
of 1995. Such forward-looking statements include statements regarding JDA's
future acquisitions, product development and financial strategies, opportunities
created by the transaction, and future product quality. Future events may
involve risks and uncertainties, among which are uncertainties related to the
final development and market acceptance of proposed new products, the ability to
complete acquired products under development and integrate new products into
existing JDA products, the effectiveness of sales and marketing programs to
promote and distribute new products, actions by competitors which could affect
sales, pricing and profitability of the Company's products, management of
product transition, international sales, the ability of the Company to attract
and train the skilled personnel required to implement its products, general
market conditions and
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other risks detailed in the prospectuses relating to the Company's recently
completed public offering, and which are and will be detailed from time to time
in SEC reports filed by the Company.

It is expected that the Company will grow internally and through strategic
acquisitions in order, among other things, to expand the breadth and depth of
its product suite and to build its professional services organization. The
Company continually evaluates potential acquisitions of complementary
businesses, products and technologies, including those which could be material
in size and scope.

Acquisitions involve a number of special risks, including diversion of
management's attention to the assimilation of the operations and personnel of
acquired businesses, and the integration of acquired businesses, products and
technologies into the Company's business and product offerings. Achieving the
anticipated benefits of any acquisition will depend, in part, upon whether the
integration of the acquired business, products or technology is accomplished in
an efficient and effective manner, and there can be no assurance that this will
occur. The difficulties of such integration may be increased by the necessity of
coordinating geographically disparate organizations, the complexity of the
technologies being integrated, and the necessity of integrating personnel with
disparate business backgrounds and combining different corporate cultures. The
inability of management to successfully integrate any acquisition the Company
may pursue, and any related diversion of management's attention, could have a
material adverse effect on the business, operating results and financial
condition of the Company. Moreover, there can be no assurance that any products
acquired will gain acceptance in the Company's markets, or that the Company will
obtain the anticipated or desired benefits of such acquisitions. Any acquisition
pursued or consummated by the Company could result in potentially dilutive
issuances of equity securities, the incurrence by the Company of debt and
contingent liabilities, amortization of goodwill and other intangibles,
purchased research and development expense, other acquisition-related expenses
and the loss of key employees, any of which items could have a material adverse
effect on the Company's business, operating results and financial condition.


Maureen N. Tuskai
Marketing Communications Manager
JDA Software Group
PH: 602.308.3233
FAX: 602.404.5520
EMAIL: maureen.tuskai@jda.com